CCNA - OSI Model - 1.txt

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Author:
djames8
ID:
40790
Filename:
CCNA - OSI Model - 1.txt
Updated:
2011-07-29 15:58:26
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CCNA OSI
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Description:
OSI Model study
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  1. Name the two sublayers of the IEEE Data Link Layer?
    Logical Link Control and Media Access Control
  2. Bridges work at which layer of the OSI reference model?
    • Layer 2 - Data Link
    • Bridges use MAC or hardware addresses for filtering
  3. Repeaters work at which layer of the OSI reference model?
    • Layer 1 � Physical Layer
    • They regenerate the physical signal
  4. Name the layer and list some characteristics of the Application Layer?
    • Layer 7 � file, print, message, application, database services
    • authentication,
  5. Name the layer and list some characteristics of the Presentation Layer?
    Layer 6 � encryption/decryption, compression, expansion
  6. List some presentation layer standards?
    • MPEG, MIDI & QuickTime for movies and sound
    • PICT, TIFF & JPEG for direct graphic and visual images
    • ASCII & EBCDIC for data standards
  7. Name the layer and list some characteristics of the Session Layer?
    Layer 5 � dialog control
  8. Name the layer and list some characteristics of the Transport Layer?
    Layer 4 � end-to-end connection
  9. List 3 statements about connection oriented sessions?
    • Segments delivered are acknowledged back to the sender upon reception
    • Segments are sequenced back into their proper order upon arrival at destination
    • Manageable data flow is maintained in order to avoid congestion, overloading, & loss of data.
  10. CPE is an acronym for?
    Customer Premise Equipment
  11. CO is an acronym for?
    Central Office (telephone implied)
  12. State 3 reasons why the networking industry might use a layered approach?
    • Allows change in one layer to occur without changing another layer
    • Clarifies what general function is to be done rather than how to do it.
    • Facilitates systematic troubleshooting
  13. Name the OSI layer that defines bit synchronization?
    Layer 1 - Physical
  14. Name the OSI layer that defines physical topology?
    Layer 1 � Physical
  15. Name the OSI layer responsible for putting 1s and 0s in a logical group?
    Layer 2 � Data Link
  16. Name the OSI layer responsibile for framing?
    Layer 2 � Data Link

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